Tomographie optique par une technique d'holographie numérique en faible cohérence Optical tomography by means of a numerical low-coherence holographic technique
- 1 December 1997
- journal article
- Published by IOP Publishing in Journal of Optics
- Vol. 28 (6) , 260-264
- https://doi.org/10.1088/0150-536x/28/6/005
Abstract
Des hologrammes digitaux sont enregistrés au moyen d'une caméra CCD et sont reconstruits numériquement, en intensité et en phase, par un algorithme calculant leur transformée de Fresnel discrète. L'utilisation d'une source de faible cohérence permet d'effectuer la tomographie d'une scène 3D, sans balayage latéral, avec une résolution en profondeur égale à la longueur de cohérence et une résolution latérale égale à la limite de diffraction de l'objectif du microscope utilisé . Digital holograms are recorded by a CCD camera and are numerically reconstructed, in intensity and phase, by means of an algorithm which calculates their discrete Fresnel transform. By using a low-coherence source, the tomography of a 3D scene can be performed without lateral scanning with a depth resolution equal to the coherence length and a lateral resolution equal to the diffraction limit of the microscope objective used .Keywords
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